Article
Chemistry, Inorganic & Nuclear
Tobias Luebbering, Patrick D. Dutschke, Alexander Hepp, F. Ekkehardt Hahn
Summary: Various bis-imidazolium salts were synthesized and their reactions with metal complexes were studied in this research, resulting in the successful preparation of several coordination compounds, with an investigation into the relationship between their structures and properties.
Article
Chemistry, Inorganic & Nuclear
Raill R. Quinonez-Lopez, Sara A. Cortes-Llamas, J. Roberto Estrada-Flores, Jose G. Alvarado- Rodriguez, Oscar Blanco-Alonso, A. Aaron Peregrina-Lucano, Elvia Becerra-Martinez, I. Idalia Rangel-Salas
Summary: Heteroleptic [RhIIICp*(NHC)] and [IrIIICp*(NHC)] complexes with a N-amino acid functionality derived from imidazolium salts were synthesized and characterized. The structure of [RhCp*{kappa 2(C,O)-NHC}Cl] complex 3f was discussed as a pair of diastereomers. The catalysts showed good yields for the transfer hydrogenation of ketones in basic propan-2-ol, and a chromatographic method for measuring compounds in the reaction was validated. These Rh and Ir complexes provide a new approach in developing catalysts based on classical NHC precursors.
Article
Chemistry, Inorganic & Nuclear
Sebastien G. Guillet, Gianmarco Pisano, Soumyadeep Chakrabortty, Bernd H. Mueller, Johannes G. de Vries, Paul C. J. Kamer, Catherine S. J. Cazin, Steven P. Nolan
Summary: An operationally simple and eco-friendly synthetic protocol for [Rh(acac)(CO)(NHC)] complexes is described, with insights into the mechanism provided through operando spectroscopy. The spectroscopic fingerprints of these complexes are correlated to NHCs' electron-donating descriptor values, highlighting a new strategy to evaluate carbenes' electronic properties. An assessment of these complexes in catalytic applications shows promising results in the catalytic hydrogenation of aromatic ketones.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Physical
Lu Shen, Yu-Yang Wang, Teng-Fei He, Lu-Yi Zou, Jing-Fu Guo, Ai-Min Ren
Summary: This study systematically investigates the properties of Cu(I) complexes with different ligands, and finds that hetero-ligands are beneficial for regulating phosphorescent efficiency. The 1:1 coordination of hetero-ligands in a tetracoordinated Cu(I) complex suppresses structural deformation, while the N<^>N ligand enhances Cu(I) participation. The addition of an appropriate amount of P<^>P ligand increases the energy level of HOMO and the proportion of LLCT, promoting the radiative decay process.
Article
Chemistry, Physical
Allyssa A. Massie, Claudia Schremmer, Isabelle Ruter, Sebastian Dechert, Inke Siewert, Franc Meyer
Summary: The study investigates the electrochemical CO2 reduction using a macrocyclic tetracarbene iron complex with N-donor supporting ligands. The iron complex exhibits high selectivity and catalytic efficiency in converting CO2 to CO, showing promising potential for further exploration in reductive chemistry.
Article
Chemistry, Multidisciplinary
Jessica L. Barilone, Jiri Tuma, Solene Brochard, Katerina Babkova, Martin Krupicka
Summary: In this work, a series of copper complexes were synthesized and characterized. The changes in UV-vis spectrum under mechanical pulling were investigated using UV-vis spectroscopy and density functional theory calculations. The results suggest the potential of copper complexes as mechanophores for mechanochromic indicators.
Article
Chemistry, Physical
Mikhail A. Bondarenko, Alexander S. Novikov, Ilyas F. Sakhapov, Maxim N. Sokolov, Sergey A. Adonin
Summary: Heteroleptic Cu(I) complexes with 1,10-octachlorophenanthroline (OCP) were synthesized and characterized by XRD and TGA. The structures of the complexes showed non-covalent interactions of Cl···Br and Cl···I, which were identified as halogen bonding (XB) with energies up to 2.1 kcal/mol according to DFT calculations.
JOURNAL OF MOLECULAR STRUCTURE
(2021)
Review
Chemistry, Organic
Anirban Sen, Samir H. Chikkali
Summary: This article assesses the potential use of C-1-symmetric diphosphorus ligands in producing chiral compounds through asymmetric hydrogenation, summarizing recent strategies and advancements in metal-catalyzed asymmetric hydrogenation using these ligands. It discusses the potential of diphosphorus ligands in producing pharmaceutical intermediates, bioactive molecules, drug molecules, agrochemicals, and fragrances.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2021)
Article
Chemistry, Inorganic & Nuclear
Dmitri Gelman, Ilya Kisets, Sofiya Zabelinskaya
Summary: The synthesis and catalytic studies of a prototypical coordinatively rigid carbometalated half-sandwich Ru(II) complex with a rigid polyaromatic tether were described. Despite its coordinatively and electronically saturated nature, the complex demonstrated the ability to activate and transfer hydrogen to polar and nonpolar double bonds. The catalytic activity was benchmarked in the Ru-catalyzed chemoselective hydrogenation of alpha,beta-unsaturated ketones, with initial mechanistic studies suggesting an inner-sphere mechanism via dihydride intermediates.
Article
Chemistry, Medicinal
Mariia Savchuk, Lucas Bocquin, Muriel Albalat, Marion Jean, Nicolas Vanthuyne, Paola Nava, Stephane Humbel, Damien Herault, Herve Clavier
Summary: Chiral transition metal complexes with N-heterocyclic carbene ligands were prepared from achiral imidazolinium salts, showing axial chirality. The enantiomers were isolated with high enantiopurities using preparative chiral HPLC. The study revealed the impact of backbone nature and transition metal type on enantiomerization barriers.
Article
Chemistry, Physical
Renat Kadyrov
Summary: An efficient and simple catalytic system has been developed for the hydrogenation of carboxylic esters using commercially available Ru-salts and imidazolium salts. This combination enables the reduction of esters to alcohols at moderate temperature and pressure, offering a practical method for alcohol synthesis.
JOURNAL OF CATALYSIS
(2023)
Article
Nanoscience & Nanotechnology
Ali Buyruk, Dominic Blaette, Marcella Guenther, Manuel A. Scheel, Nicolai F. Hartmann, Markus Doeblinger, Andreas Weis, Achim Hartschuh, Peter Mueller-Buschbaum, Thomas Bein, Tayebeh Ameri
Summary: By introducing 1,10-phenanthroline, defects on the surface of polycrystalline perovskite thin films were successfully passivated, and excess/unreacted PbI2 was converted into beneficial complex species, promoting efficient hole transfer at the interface. Experimental results showed that this treatment significantly improved the power conversion efficiency and stability of unencapsulated perovskite solar cells.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Inorganic & Nuclear
Elizabeth M. Bolitho, Nathan G. Worby, James P. C. Coverdale, Juliusz A. Wolny, Volker Schuenemann, Peter J. Sadler
Summary: Organo-osmium(II) complexes catalyze the reduction of prochiral ketones to optically pure alcohols with high efficiency and enantioselectivity. These complexes also exhibit high turnover frequencies and conversions for the asymmetric transfer hydrogenation of acetophenone-derived substrates.
Article
Chemistry, Multidisciplinary
Rebeca Arevalo, Ramon Lopez, Larry R. Falvello, Lucia Riera, Julio Perez
Summary: The reactions of [Re(N-N)(CO)(3)(PMe3)]OTf compounds with tBuLi and LiHBEt3 exhibit different site-selectivity depending on both chelate and nucleophile. Hydride addition to bipy and phen derivatives lead to distinct outcomes, resulting in the formation of Re-I complexes containing several C(sp(3)) centers.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Xintuo Yang, Xiang Li, Pinhong Chen, Guosheng Liu
Summary: A novel Pd(II)-catalyzed enantioselective Markovnikov hydrooxygenation of unactivated terminal alkenes using a substituted pyridinyl oxazoline (Pyox) ligand has been developed. The (EtO)(2)MeSiH/BQ redox system is crucial for the highly selective and efficient hydrooxygenation, where alkylpalladium(II) species generated from enantioselective oxypalladation step is reduced by silane. This method provides an efficient access to optically pure alcohol esters from easily available alkenes with excellent enantioselectivities and features a broad substrate scope.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Inorganic & Nuclear
Eva Juergens, Doris Kunz
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2017)
Article
Chemistry, Inorganic & Nuclear
Benjamin Raible, Doris Kunz
ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES
(2016)
Article
Chemistry, Inorganic & Nuclear
Kim S. Flaig, Benjamin Raible, Verena Mormul, Natalie Denninger, Caecilia Maichle-Moessmer, Doris Kunz
Article
Chemistry, Organic
Anna Zens, Philipp Seubert, Benedikt Kolb, Marius Wurster, Marcel Holzwarth, Fabian Mannchen, Robert Forschner, Birgit Claasen, Doris Kunz, Sabine Laschat
SYNTHESIS-STUTTGART
(2018)
Review
Chemistry, Inorganic & Nuclear
Doris Kunz, Kim S. Flaig
COORDINATION CHEMISTRY REVIEWS
(2018)
Article
Chemistry, Physical
Yingying Tian, Eva Juergens, Katharina Mill, Ronja Jordan, Theo Maulbetsch, Doris Kunz
Article
Chemistry, Organic
Anna Zens, Florian Bauer, Benedikt Kolb, Fabian Mannchen, Philipp Seubert, Robert Forschner, Kim S. Flaig, Andreas Koehn, Doris Kunz, Sabine Laschat
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2019)
Article
Chemistry, Inorganic & Nuclear
Yingying Tian, Theo Maulbetsch, Ronja Jordan, Karl W. Tornroos, Doris Kunz
Article
Chemistry, Multidisciplinary
Theo Maulbetsch, Eva Juergens, Doris Kunz
CHEMISTRY-A EUROPEAN JOURNAL
(2020)
Article
Chemistry, Multidisciplinary
Theo Maulbetsch, Doris Kunz
Summary: The synthesis of a novel NHC-containing porphyrinoid ligand with good fluorescence properties was successfully achieved. Experimental results demonstrated that the heterocyclic moieties in both the ligand and its metal complexes exhibit aromatic character instead of antiaromatic macrocycles.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Fabio Mazzotta, Georg Zitzer, Bernd Speiser, Doris Kunz
CHEMISTRY-A EUROPEAN JOURNAL
(2020)
Article
Chemistry, Inorganic & Nuclear
Fabio Mazzotta, Karl W. Tornroos, Doris Kunz
Article
Biochemistry & Molecular Biology
Ronja Jordan, Doris Kunz
Summary: The coordination chemistry of an electron-rich macrocyclic CNC pincer-ligand was studied using NMR spectroscopy and X-ray crystal structure analysis. It was found that the ligand exhibited bridging coordination with lithium, facial coordination with potassium, and C-H activation with metal complexes.
Article
Chemistry, Inorganic & Nuclear
Fabio Mazzotta, Doris Kunz
Summary: Scandium complexes with a C-ylidic, electron-deficient Cp ligand were obtained by substituting tetrahydrofuran ligands, resulting in an equilibrium among free ligands, half-sandwich complexes, and cationic metallocenes in acetonitrile, which was confirmed by NMR spectroscopy.
Article
Chemistry, Inorganic & Nuclear
Dominic Schmid, Alexander Seyboldt, Klaus Eichele, Doris Kunz
DALTON TRANSACTIONS
(2017)
